Air-tube and dirt-trap for oil-burners.



G. A. PINGREE & R. A. UHLIN. AIR TUBE AND DIRT TRAPVFOH olL uRNEns. APPUCATIQN ElLED SEPT. 26. 1916.

LlS. Patented Jan. 2, 1917.

.having a spraying outlet 6.

narran GEORGE A. INGREE AND ICHM/D A.. UI-ILIIN, OF SETTLE, WASHINGTON.

AIR-TUBE AND DIRT-TRAP FOR GIL-BURNEBS.

Speciiicatiou of Letters Patent.

Patented Jan. 2, 121?.

.application filed September 26, 1916. Serial No. 122,261.

To all whom t may concern Be it known that We, GEORGE A. Pinceau and RICHARD A. UHLIN, both citizens of the Unitedv States, residing at Seattle, in the county of King and State of l/Vashington, have invented certain new and useful improvements in Air-Tubes and Birt- Traps for Oil-Burners, of which the following is a specication.

This invention relates to oil burners, and its object is to provide means for preventing back-firing, means for entrapping any particles of :foreign matter that may be in the oil and for readily removing such matter from thevcommunicating pipes.

To this end our invention consists in the construction and combination of parts forming an air tube and dirt trap for oil burners lhereinafter more fully described reference being hadto the accompanying drawing in which;

Figure -1v represents a longitudinal, ver tical section partly in side elevation, of an air tube and vdirt trap for oil burners according to our invention. Fig. 2 represents a top end view of the .sprayingt tip with the nozzle removed.l

Numeral 3 represents the oil vapor pipe,

which, in burners of-this order, have a portion of their length exposed to heat from the burner to serve as a retortfor generatingvapor or gas from the oil. The body 4 of this tip 1s provided with a nozzle 5 A plunger 7 having a needle end 8 is fitted to recipro cate longitudinally in the tip to push any clogging matter out at 6.

The body 10 of the wire lever 9 passes through a cap nut 11 and screw 12 and the side of the tip and has a crank 18 on its head 14, that engages thel plunger 7 to reciprocate it by revolutions of the said lever 9. The intake tube 15 is open to admit air at both ends, and is removably attached to the tip 4 by fitting closely around the cylindrical projection 16 and resting upon the shoulder 17. The tube 18 beingin part-the subject of another application of even date herewith', Serial No. 122,262-, is not now. further described. Through it the oil vapor passes with air into :L mixing chamber, of which adjacent portions are shown at 19.

The oil vapor pipe 3 enters the tip 4 at a point below' the plunger .and opposite theblank Wall 20 of-.t'he tip 1n order that the current of incoming oil vapormay be suddenly stopped by the wall, to permit any detritus in the oil to fall.. to the bottom 2l. To further intercept the passage of dirt we locate a screen 22, of some material like wire netting of about 100 mesh, across the vapor passage. y

The lower end 23 of the tubular tip 4 is oonically chamfered both externally and internally to lit into a correspondingly chamfered annular seat in the base cap 24..

This is to prevent the open end of the tip being spread or compressed out of true form by undue strain on the nut 24; it being necessary to remove and replace this nut for cleaning purposes, by unskilled operatives. The chamber 25 outlined by the bore in the tip 4, the floor 2l and screen 22, forms a trap to catch any detritus carried in the oil vapor. In course ottime,

with the best of oil, and more frequently with common oil, the screen 22 becomes filled and coated, stopping the burner. This demands removal of the screen and insertion of a new one, and to do this with little Work and delay, we make the screens to lit closely into the tube 4, take oli' the nut 24, crowd the screen up to its place and replace the nut. The outlet 6, also, may become clogged by an interior coating, so we make the nozzle 5, to be readily unscrewed by pliers inserted in either end of the intake tube 15, still leaving that tube removably held upon the smooth projection 16 and shoulder 17. From this trap the vapor passes up beside the plunger 7 in grooves indicated by dotted line 26, to the outlet 6. The double conical seat of the tip 4 in the Acap 24 permits that cap 'to form a-tight joint with little pressure, and to be easily removed to empty out whatever the trap may have gathered. The cylindrical lit of the intake tube l5 around the top of the tip 4, and the shoulder 17 supporting it steadily in place, prevents escape of gas yaround the tip that wouldv We claim; 1. In an air1 tube and dirt trap for oil burners, a tip connected with a retort, and

having a spraying nozzle, and shaped around the nozzle as a smooth cylinder with a shoulder; an air tube having an 1ntake opening at each end, a delivery opening at one side and opposite thereto a cylindrical aperture fitted to the said smooth cylinder and shoulder, whereby the, air tube may be freely raised from the shouldered cylinder for removal.

2. An air tube and dirt trap 4for oil' burners, comprising a spraying tip having a trap chamber, a pipe for communicating with a retort and entering a side of the chamber; a screen litted to securely engage the chamber vWall by being pushed upward against a shoulder thereof; and a removtake tube; the latter having open ends whereby the nozzle is accessible for removal or replacing.

In testimony whereof We aflix our signatures in presence of tivo witnesses.

GEORGE A. PINGREE. RICHARD A. UHLIN.

Witnesses:

M. M. PIXLEY, B. M. PINNEH.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

